Incandescent electric lamp



(No Model.) E. R. KNOWLES & P. E. ID ELL.

INGANDESOENT ELECTRIC LAMP. No. 292,824. Patented Jan. 22, 1884.

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2 Z WM 2 Urrrran STATES EDlVARD R. KXOYV'LES, OF BROOKLYN, X. Y., AXDFRANK E. IDELL, OF HO- BOKEN, X. J., ASSIGNORS TO THE COXSOLIDATEDELEOTl-tltf LIGHT CO)! PAXY, OF XEYV YORK.

INCANDESCENT ELECTRIC LAM P.

SPECIFICATION fcrmin art of Letters Patent No. 292 324 a P a Applicationfiled September 6, 1882. (No model.)

dated January 22, 1384.

1' 9 aZZ 107mm it may concern.-

Be it known that we, EDWARD R. KNOWLES, a resident of Brooklyn, countyof Kings and State of New York, and FRANK E. IDELL, a resident ofHoboken, county of Hudson and State of New Jersey, have invented anewand useful Improvement in Electric Lamps and Sockets or Holders; and wedo hereby declare the following to be afull, clear, concise, and ex- IOact description of the same, reference being had to the accompanyingdrawings, and to the letters and figures of reference marked there on.

This invention consists of a socket and holder i5 for incandescentelectric lamps in which the circuit is completed when the lamp is placedin the socket in its appropriate holder, subject, however, to suchcircuit-controller as shall instantly and effectually make or break thecircuit and light or extinguish the lamp, at the same time making asocket and holder from which the glass bulb, should it be broken orshould it be necessary to take it out for any cause, can be removed byany one not skilled 2 5 in the art and anew one substituted therefor,and a socket which cannot be removed from the holder while the currentis acting on the lamp, it being necessary to first break the currentbefore the lamp can be detached from its socket, and alsoanovel andefficient means for connecting the electrodes of the lamp to thecircuit-wires. I11 all the fixtures of this class in use at the presenttime the lamp can be de tached and removed from its socket and thesocket from its holder at will, whether the lamp be burning or not. Inthe present invention the lamp is placed in a socket, and there held insuch a way that it can be easily taken out at any time, and the socketcan be attached to and removed from its holder only when the currentwhich energizes the lamp is turned off, so that no accident may arisewhile the lamp is being put in or taken out of position.

In the annexed drawings, Figure 1 is a side view of the lamp-socket andholder in position, hanging pendent from the fixture. Fi 2 is asectional view of the holder. Fig. 3 is a vertical section through lamp,socket and holder, and Fig. is a section of the socket itself. Fig. Sisatop view of Fig. &, and Fig. 6 a detail drawing to be hereinafterreferred to. The lamp used is of the form described by us in anotherapplication, although any form of bulb-lamp can be mat e to fit thisfixture.

The socket, Fig. 4', consists of a ring or cylinder of metal or anysuitable material, F, slotted on opposite sides by the cut Q, so as toallow it to open and receive the lower end of the bulb of the lamp, andyet retain its genral appearance. At two opposite sides, N N, holes areperforated through F for a purpose to be described farther on. Thecylinder F is firmly attached to abase of non-conductingmaterial, E,into which are screwed the projecting pins O 0, formed as shown. On thestraight sides of thelampP, Figs. 1 and 3, little teats or projectionsare placed, and when the lamp is slid into the cylinder F, which it justfits, these little teats snap in thcholes X I? and securely fasten theglobe 1 into the cylinder F, as shown in Fig. 3. The conductors X Y arepassed through E and wound around 0 and G, which are then screwed downinto place, thus making a good contact between C O and KY, and yet aconnection which can be broken by simply unscrewing C G. The globe P canthen be drawn out of F, so as to allow the teats to slip out of theholes X IT.

The holder for the socket, Fig. 2, consists of a block of non-conductingmaterial, l3, hollowed out, as shown, and tapped with a screw thread toallow it to be fastened to an appropriate support. It perforated by twoholes, 0 G, into which the pins C C can pass. The sides of the block Bare grooved, and in these grooves are laid the springs D D, as shown,and which are fastened to the back of These springs are so arranged thatwhen the conically-pointed pins 0 C are pushed up into the holes 0 0,the springs D D ily out and into the notches V V on O C, and so hold thesocket and lamp securely in the holder B. XV hen it is desired to takethe soeketand lamp away from the holder B, the two springs are pinchedtogether so as to clear the notches V and Y, and the lamp and socket canthen be drawn out of B. The ends of springs D and ill stantly pressesagainst K.

2 292,32&

D are covered with a non-conductor, It, to prevent any possibility of ashort circuit occurring between them. The circuit-break1ng apparatusconsists of thebut-ton S, of conducting material, the spindle J, spring8, pin I, and button K. The button K is composed of four inclinedsurfaces, H H G G, two of which, G and G, are faced with metal, and overwhich the pin I slides when the button S is turned. The spring 8 tendsconstantly to keep the button S away from the box 13, and the pin I con-The and conductors may be attached in any suitable manner. In theposition in which S is shown, the metallic circuit is completed by thepin I pressing against the metallic surfaces G and G, and it will beseen that the springs D and D cannot be pressed together, whileS remainsin the position shown. The button, being oblong, prevents the springsfrom being closed until it is turned to set in a position exactly atright angle to that in which it is shown; but the moment the button isturned lengthwise of the lamp the springs D and D can be closed and thelamp removed, the pinI in that case resting on the insulating-pieces Hand H, and breaking the circuit across K.

The electric circuit is as follows: The current enters at the thimble 1,Figs. 2 and 6, and thence to spring D, pin 0, conductor X, loop 0,conductor Y, pin 0, spring D, contact G, pin I, contact G, to thimble 2to point. \V'li'en button S is turned at right angle to position shownthis electric circuit is broken by the pin I being moved oft from thecontacts G den manner, so as to prevent sparks.

and G. This break is accomplished ina sud- The surfacesH H G G areinclined, and as the pin I turns it is slid up and along these inclinesuntil it comes to their end, when the spring suddenly snaps it down tothe beginning of the next pair of inclines, thus making and breaking thecircuit suddenly and effectually.

Having thus described ourinvention, what we claim is 1. In anincandescent electric lamp, the combination of the illuminating-chamberP, provided with projections or teats, the socket F, having perforationsN N, an insulating base, E, and pins 0 0, connected to the elec trodesof said lamp, substantially as described, for the purpose specified. v

2. In an incandescent electric lamp, the combination of anilluminatingchamber, I a socket, 1*, provided with screw-pins C G,having notches V and V, and a support, 13, containing a switch, H G, andprovided with clamps D and D, substantially as described, for thepurpose specified.

3. In theveircuit of an incandescent electric lamp, the combination of aswitch-piece, S, and lamp-clamps R, the two coacting to prevent the lampfrom being removed until the circuit is turned off.

EDW'ARD R. KNOIVLES. FRANK E. IDELL.

\Vitnesses:

War. II. BROADNAX, .I. EDGAR BULL.

